摘要
以广西钦州市钦南区巨尾桉人工林(10a)和马尾松天然林(15～20a)为研究对象,采用平均木法和样方收获法测定林分生物量,分别样地采集植物和土壤样品,采用重铬酸钾-水合加热法测定碳含量,探讨桉树林取代马尾松林对森林生态系统碳含量、碳贮量及其分配规律的影响。结果表明:巨尾桉植株的碳含量(经各器官生物量加权)平均为47.32%,比马尾松(50.17%)的低5.7%。巨尾桉人工林生态系统总碳贮量为123.086t/hm2,是马尾松天然林(88.238t/hm2)的1.40倍;其植被(含凋落物)生物量和碳贮量分别为115.082t/hm2和53.712t/hm2,依次是马尾松天然林(生物量40.686t/hm2和碳贮量19.421t/hm2)的2.83倍和2.77倍,差异极显著(p<0.01)。两种森林植被碳贮量的差异与其生物量的差异相一致,表明桉树人工林取代马尾松天然林可以提高森林植被生产力及其固碳能力。
Eucalyptus grandis ×E. urophylla plantation （10 a） and Pinus massoniana nature forest （15～20 a） in the south area of Qinzhou in Guangxi were taken as the research object,using the average wood and quadrant harvesting biomass method,and collecting samples of plants and soil samples respectively,using potassium dichromate hydro-heat in determination of the content of carbon,to explore effects of Eucalyptus grandis ×E. urophylla plantation replacing Pinus massoniana nature forest on the forest ecosystem carbon content,carbon accumulation and its distribution. The results showed that the average carbon content of Eucalyptus grandis ×E. urophylla （The organs biomass-weighted） is 47.32%,5.7% lower than that of Pinus massoniana（50.17%）.The total carbon accumulation of Eucalyptus grandis ×E. urophylla plantation is 123.086 t/hm2,which is 1.40 times that of Pinus massoniana nature forest （88.238t/hm2）;its vegetation （including litter）biomass is 115.082 t/hm2,which is 2.83 times that of Pinus massoniana nature forest （40.686 t/hm2） and the carbon accumulation is 53.712 t/hm2,which is 2.77 times that of Pinus massoniana nature forest （19.421 t/hm2）,there are extremely significant differences （p0.01）.The diversity in carbon accumulations between the two kinds of forest vegetations and that between the biomasses are consistent,which indicates that if Eucalyptus plantation replaces Pinus massoniana nature forest the productivity and the carbon sequestration capacity of the forests will be improved.
出处
《江西农业大学学报》
CAS
CSCD
北大核心
2010年第6期1168-1174,共7页
Acta Agriculturae Universitatis Jiangxiensis
基金
国家环保公益性行业科研专项(200709017)
广西林业局重大项目(桂林科字2009第8号)
广西大学人才引进基金项目"广西滨海生态过流带生态系统退化机理及恢复研究"
关键词
巨尾桉
马尾松
森林生态系统
碳含量
碳贮量
Eucalyptus grandis ×E. urophylla
Pinus massoniana
forest ecosystem
carbon content
carbon accumulation
